Each of the five types of conotoxins attacks a different target: 1  Î±-conotoxin attacks acetylcholine receptors at nerves and muscles. 2  Î´-conotoxin inhibits the inactivation of voltage-dependent sodium channels. 3  Îº-conotoxin inhibits potassium channels. 4  Î¼-conotoxin inhibits voltage-dependent sodium channels in muscles. Ï-conotoxin inhibits N-type voltage-dependent calcium channels. Because N-type voltage-dependent calcium channels are related to algesia (sensitivity to pain) in the nervous system, Ï-conotoxin has an analgesic effect: the effect of Ï-conotoxin M VII A is 100 to 1000 times that of morphine.
Master Sgt. Peter Andrew McKenna, a Green Beret, was killed in a Taliban attack at a US Special Forces base in Kabul, Afghanistan on Friday. Rhode Island Sen. Jack Reed, who met McKenna at the parade and presented him with the flag, called him a 'truly great citizen, soldier, person and patriot' in a tweet on Sunday.
Jonathan Crombie, who played Gilbert Blythe in the classic 1980s PBS film 'Anne of Green Gables,' has died at 48. (Photo: CBC/YouTube). 46503 CONNECT 349 TWEET 3 LINKEDIN 50 COMMENT EMAIL MORE. For many women of Generation X, Jonathan Crombie was their first PBS crush, even if they didn't know his name. He played Gilbert Blythe, the school rival, boyfriend and eventual husband of the heroine in the beloved Anne of Green Gables movies. Crombie, 48, died of a brain hemorrhage Wednesday In New York, his sister Carrie told the Canadian Broadcasting Company Saturday.